LNHU090408R-L55T WKK25G Wendeplatten - Walter Tools

Take advantage of the combination of Tiger·tec Gold wear resistance, a grade optimised for cast iron, and precise chip control for reliable milling cycles; order directly via Metav Werkzeuge or consult the team for application support.

LNHU090408R-L55G – Milling insert, Tiger·tec Gold, for cast iron (Walter Tools)

The LNHU090408R-L55T WKK25G is a rectangular milling insert designed for robust and consistent machining of cast iron components in production and repair environments.

• Tiger·tec Gold coated for high wear resistance
• Optimised grade WKK25G for cast iron machining
• Rectangular 09 format with 0.8 mm corner radius
• L55T chipbreaker for reliable chip control

Greater uptime through advanced coating and grade selection

The combination of the Tiger·tec Gold coating and the WKK25G grade delivers a measurable improvement in tool life when working with abrasive cast iron. The coated cemented carbide substrate is tailored to resist the micro‑abrasive wear typical of grey and nodular cast irons, so the insert sustains cutting performance for longer intervals. In practice, this means fewer indexings and tool changes, which directly supports higher machine uptime and lower process costs while preserving component tolerances.

Stable machining and predictable chip formation

A 0° negative rake and the L55T chipbreaker create a cutting geometry that promotes short, controlled chips and reduces the risk of built‑up edge during interrupted cuts. The negative rake increases edge strength, making the insert well suited to shock‑loaded or interrupted milling common in automotive and heavy engineering castings. Reliable chip control reduces rework and scrap, improving overall process reliability in repetitive production runs.

Robust edge and surface quality from the rectangular format

The rectangular 09 format with a 0.8 mm corner radius balances edge strength and surface finish: the radius supports a stable cutting edge under heavy feed rates, while the geometry maintains an acceptable surface quality without excessive cutting forces. For operations that require a compromise between tool life and part finish, this insert provides a practical middle ground, allowing productive material removal rates without sacrificing geometry consistency.

Practical application guidance and process support

This insert is specified for machining cast iron in accordance with its grade designation and material group compatibility. When integrating the insert into a machining process, select holders that accept rectangular inserts of the 09 format and tune feeds and speeds for the abrasive nature of cast irons. If additional data or cutting parameter recommendations are needed, Metav Werkzeuge can provide tailored advice to match the insert’s capabilities to the machine and job requirements. Contact details for technical queries are available for straightforward consultation.

For cast iron milling applications that demand wear resistance and predictable chip control, rely on Walter Tools’ Tiger·tec Gold WKK25G inserts — contact Metav Werkzeuge for ordering and technical application support: info@metav-werkzeuge.com / +49 2822 7131930

Technical data

• SKU: LNHU090408R-L55T-WKK25G-WALTER
• Label: Fräswendeschneidplatte LNHU090408R-L55T WKK25G Walter Tools
• Product type: Milling insert

Facts

• Size format: 09
• Thickness: 04
• Corner radius: 0.8 mm
• Free cutting angle: 0° (negative)
• Tolerance class: H

Special features

• Grade: WKK25G (coated carbide)
• Coating technology: Tiger·tec Gold
• Chipbreaker: L55T
• Insert shape: Rectangular
• Suitable for: Cast iron
• Series: Tiger‑tec Gold

FAQ

What materials is this insert suitable for?
The insert is designed for machining cast iron, as indicated by the WKK25G grade and the substrate/coating combination.

How does the Tiger·tec Gold coating improve performance?
The Tiger·tec Gold coating enhances wear resistance and protects the carbide substrate against abrasive particles common in cast iron, which extends tool life and improves process stability.

What is the advantage of the L55T chipbreaker?
The L55T chipbreaker produces short, controlled chips that reduce folding and entanglement, improving safety and surface quality during interrupted and continuous milling.

Is the corner radius suitable for heavy roughing?
The 0.8 mm corner radius provides a robust cutting edge that tolerates higher feed rates and shock loads, making it appropriate for many roughing applications in cast iron.

Manufacturer/Responsible: Walter Deutschland GmbH; Derendinger Straße 53; 72072 Tübingen; Germany

Walter AG (brand appearance: Walter Tools) is one of the world’s leading manufacturers of precision tools for metalworking and is part of the Sandvik Group. Protected trademarks and trade names are the property of their respective owners. Brand names and trademarks are mentioned for explanatory purposes only. There is no connection between our company and the named brands. The offered item is an original, factory‑new product of the manufacturer.